WO1998054718A1 - Apparatus for reproducing video data of a video compact disc player - Google Patents

Apparatus for reproducing video data of a video compact disc player Download PDF

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Publication number
WO1998054718A1
WO1998054718A1 PCT/KR1998/000080 KR9800080W WO9854718A1 WO 1998054718 A1 WO1998054718 A1 WO 1998054718A1 KR 9800080 W KR9800080 W KR 9800080W WO 9854718 A1 WO9854718 A1 WO 9854718A1
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WO
WIPO (PCT)
Prior art keywords
signal
video
digital
data
section
Prior art date
Application number
PCT/KR1998/000080
Other languages
French (fr)
Inventor
Soon Bae Park
Original Assignee
Daewoo Electronics Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1019970021561A external-priority patent/KR100240341B1/en
Priority claimed from KR1019970021572A external-priority patent/KR19980085476A/en
Application filed by Daewoo Electronics Co., Ltd. filed Critical Daewoo Electronics Co., Ltd.
Priority to JP50050899A priority Critical patent/JP2002501703A/en
Publication of WO1998054718A1 publication Critical patent/WO1998054718A1/en

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/16—Manual control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
    • H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/84—Television signal recording using optical recording
    • H04N5/85—Television signal recording using optical recording on discs or drums
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/7921—Processing of colour television signals in connection with recording for more than one processing mode
    • H04N9/7925—Processing of colour television signals in connection with recording for more than one processing mode for more than one standard

Definitions

  • the present invention relates to a method and apparatus for reproducing video data of a video compact disc player (hereinafter, referred to as "VCDP”) and more particularly, relates to the method and apparatus wherein caption data is displayed without a loss of outputted caption data while video data having caption data of a phase alternation line system (hereinafter, referred to as "PAL system”) is reproduced via a display equipment of a national television system committee system (hereinafter, referred to as "NTSC system”) in a video compact disc player.
  • PAL system phase alternation line system
  • NTSC system national television system committee system
  • optical disc players which record audio/video signals onto semipermanent optical discs and which reproduce recorded audio/ video signals, have developed. More particularly, the optical disc players such as a compact disc player
  • CDP laser disc player
  • LDP laser disc player
  • CDGP compact disc graphic player
  • VCDP video compact disc player
  • optical disc players output video and/or audio signals recorded on the optical discs via speakers rather than via video and/or audio reproducing equipments and because they have a much higher signal-to-noise ratio than conventional video and/or audio reproducing equipments, they are capable of reproducing signals with even better quality (s) of picture and/or of sound, and do not produce a noise caused by unstable reproduction and modulation. Additionally, they have many advantages such as reproducing video and/or audio signals in a state which is almost not subjected to distortion and to ghost, a random access operation and the like, and thereby tend to rapidly make progress and to be widely used.
  • video data is recorded together with audio data onto video compact discs (referred to as "VCD's") which are loaded into VCDP's among the optical discs which are loaded into the optical disc players to reproduce recorded signals therefrom, and provides sounds and pictures to users.
  • VCD's video compact discs
  • the video data which is recorded onto the VCD's would be recorded in a system of national television system committee (hereinafter, referred to as "NTSC") or of phase alternation by line (hereinafter, referred to as "PAL”) or the like.
  • NTSC national television system committee
  • PAL phase alternation by line
  • display equipments which are connected to VCDP's to provide sounds and pictures would be display equipments of the system of the NTSC, PAL and the like.
  • video data of the PAL system which is displayed via display equipment of the PAL system has 625 scanning lines and video data of the NTSC system which is displayed via display equipments of the NTSC system has 525 scanning lines.
  • a display equipment of the NTSC system display the video data which is recorded in the PAL system, it give rises to a loss of a region corresponding to 100 lines which is placed at a lower end portion on a screen of the display equipment.
  • a conventional caption is placed at a lower portion of a screen, the above lost region corresponding to 100 lines is not even displayed or is displayed with most of the lost region thereof cut off.
  • the present invention provides an apparatus for reproducing video data of a video compact disc player, which comprises: key inputting means for generating a key input signal; optical pick-up means for reading a radio frequency signal from an optical disc having caption data recorded in a phase alternation line system and for generating a read radio frequency signal; driving means for driving said optical pick-up means and said optical disc; radio frequency amplifying means for amplifying the radio frequency signal provided from said optical pick-up means; first digital signal processing means for digital signal processing an amplified radio frequency signal from said radio frequency amplifying means; clock generating means for a sub carrier signal corresponding to a record type of data of said optical disc; second digital signal processing means for generating a color synchronizing signal, a horizontal synchronizing signal, and an analog video signal in response to the radio frequency signal from said first digital signal processing means; control means, responsive to the key input signal from said key inputting means, to the color synchronizing signal and to the horizontal synchronizing signal from said second digital signal processing means, for controlling said
  • the present invention provides an apparatus for reproducing video data of a video compact disc player, which comprises: key inputting means for generating a key input signal; optical pick-up means for reading a radio frequency signal from an optical disc having caption data recorded in a phase alternation line system and for generating a read radio frequency signal; driving means for driving said optical pick-up means and said optical disc; radio frequency amplifying means for amplifying the radio frequency signal provided from said optical pick-up means; first digital signal processing means for digital signal processing an amplified radio frequency signal from said radio frequency amplifying means; clock generating means for generating a sub carrier signal corresponding to a record type of data of said optical disc; second digital signal processing means for generating a color synchronizing signal, a horizontal synchronizing signal, and an analog video signal in response to the radio frequency signal from said first digital signal processing means; control means, responsive to the key input signal from said key inputting means, to the color synchronizing signal and to the horizontal synchronizing signal from said second digital signal processing means, for
  • the apparatus for reproducing video data of a video compact disc player in the case where video data having caption data of the PAL system is reproduced via a display equipment of an NTSC system, a signal displayed on an upper portion and a middle portion of a screen is displayed without processing the signal. Also, a signal displayed on a lower portion of the screen is displayed after reducing line numbers of the signal. Consequently, the video signal recorded in the PAL system is reproduced via a display equipment of the NTSC system without a loss of caption data.
  • FIG. 1 is a block diagram for illustrating a first embodiment of an apparatus for reproducing video data of a video compact disc player according to the present invention
  • FIG. 2a is a view for illustrating a first method for outputting two horizontal line video signals as one horizontal line video signal
  • FIG. 2b is a view for illustrating a second method for outputting two horizontal line video signals as one horizontal line video signal
  • FIG. 2c is a view for illustrating a third method for outputting two horizontal line video signals as one horizontal line video signal
  • FIG. 3a is a view for showing a screen on which data of a PAL system generated by prior data reproducing apparatus is being displayed on a display equipment of an NTSC system;
  • FIG. 3b is a view for showing a screen on which data of a PAL system generated by the present invention is being displayed on a display equipment of an NTSC system;
  • FIG. 4 is a block diagram for illustrating a second embodiment of an apparatus for reproducing video data of a video compact disc player according to the present invention.
  • FIG. 1 is a block diagram for illustrating a first embodiment of an apparatus for reproducing video data of a video compact disc player according to the present invention.
  • the video data reproducing apparatus according to the first embodiment of the present invention comprises a key inputting section 10, an optical pick-up section 20, a driving section 30, a radio frequency amplifying section 40, a first digital signal processing section 50, a clock generating section 60, a second digital signal processing section 70, a control section 80, an analog video signal processing section 90, and a display section 99 of an NTSC system.
  • Key inputting section 10 comprises a plural function key (not shown), generates a key input signal 11 for executing a conventional function of the video compact disc player, and provides the key input signal 11 to control section 80.
  • Optical pick-up section 20 executes an optical pick-up operation of the optical disc (not shown) having caption data loaded on a disc tray (not shown) of the video compact disc player. In addition, optical pick-up section 20 generates a radio frequency signal 21 reflected from the optical disc.
  • Driving section 30 drives optical pick-up section 20 and the optical disc in response to a control signal 81a inputted from control section 80.
  • Radio frequency amplifying section 40 amplifies radio frequency signal 21 provided from optical pick-up section 20 and provides an amplified radio frequency signal 41 to first digital signal processing section 50.
  • Clock generating section 60 generates a color sub carrier signal for processing a video signal and provides the color sub carrier signal to analog video signal processing section 90.
  • clock generating section 60 generates a color sub carrier signal of an NTSC system when video data recorded on the optical disc is video data of the NTSC system, and generates a color sub carrier signal of a PAL system when the video data recorded on the optical disc is video data of the PAL system.
  • the color sub carrier signal of the NTSC system is 3.58MHz and the color sub carrier signal of the PAL system is 4.43MHz.
  • First digital signal processing section 50 executes a digital signal processing operation of the amplified radio frequency signal 41 from radio frequency amplifying section 40 and provides a digital signal processed radio frequency signal 51 to second digital signal processing section 70.
  • Second digital signal processing section 70 comprises a decoder 71 and a digital/analog converter 72.
  • Decoder 71 decompresses a compression of the digital video signal provided from first digital signal processing section 50 and decodes the digital video signal whose compression is decompressed.
  • Decoder 71 provides a decompressed digital video signal 71a to digital/analog converter 72 and provides a color synchronizing signal 71b and a horizontal synchronizing signal 71c to control section 80, respectively.
  • Digital/analog converter 72 converts the digital video signal 71a from decoder 71 into an analog video signal 72a and provides the analog video signal 72a to analog video signal processing section 90.
  • Control section 80 controls driving section 30 and clock generating section 60 in response to key input signal 11 from key inputting section 10 and provides a switching signal and control signals in response to color synchronizing signal 71b and horizontal synchronizing signal 71c from decoder 71.
  • control section 80 when the optical disc loaded on the disc tray is an optical disc having caption data of the PAL system, control section 80 generates the control signal to clock generating section 60 according to the key input signal 11 from key inputting section 10. At this time, clock generating section 60 provides the color sub carrier signal of 4.43MHz of the PAL to analog video signal processing section 90 as a clock signal 61. In addition, control section 80 sets a video signal processing mode to a PAL mode.
  • Analog video signal processing section 90 comprises a line-by-half-reducing section 91, a multiplexing section 92, and a red-green-blue encoding section 93 (hereinafter, referred to as "RGB encoding section").
  • Line-by-half-reducing section 91 divides an analog video signal having 426 to 625 line components from digital/analog converter 72 of second digital signal processing section 70 into a horizontal line of unit and detects to output a correlation between an upper line and a lower line with respect to each of the line signals. Then, line-by-half-reducing section 91 reduces two horizontal lines of a video signal by half and provides a horizontal line thereof to multiplexer 92.
  • Multiplexing section 92 outputs data between line 1 and line 425 as a normal video signal in response to switching signal from control section 80 and selectively outputs the reduced analog signal 91a from line-by-half-reducing section 91 as data between line 426 and line 625 to RGB encoding section 93.
  • RGB encoding section 93 responds the control signal provided from control section 80 in response to color synchronizing signal 71b, encodes analog video signal
  • FIG. 2a is a view for illustrating a first method for outputting two horizontal line video signals as one horizontal line video signal.
  • line-by-half-reducing section 91 adds a half of horizontal line signal of line 426 to a half of horizontal line signal of line 427 and outputs the added horizontal line signal as a horizontal line video signal which is scanned to a horizontal line of line 426 of display section 99 of the NTSC system.
  • line-by-half-reducing section 91 adds a half of horizontal line signal of line 428 to a half of horizontal line signal of line 429 and outputs the added horizontal line signal as a horizontal line video signal which is scanned to a horizontal line of line 427 of display section 99 of the NTSC system.
  • line-by-half-reducing section 91 adds a half of horizontal line signal of line 430 to a half of horizontal line signal of line 431 and outputs the added horizontal line signal as a horizontal line video signal which is scanned to a horizontal line of line 428 of display section 99 of the NTSC system.
  • a number of horizontal line signals of 200 lines between line 426 and line 625 is reduced to a number of horizontal line signals of 100 lines between line 426 and line 525 which can be displayed on display section 99.
  • FIG. 2b is a view for illustrating a second method for outputting two horizontal line video signals as one horizontal line video signal.
  • line-by-half-reducing section 91 adds a horizontal line signal of line 426 and a horizontal line signal of line 427 and outputs the added signal as a horizontal line video signal which is scanned to a horizontal line of line 426 by means of dividing the added signal into two.
  • line-by-half-reducing section 91 adds a horizontal line signal of line 428 and a horizontal line signal of line 429 and outputs the added signal as a horizontal line video signal which is scanned to a horizontal line of line 427 by means of dividing the added signal into two.
  • line-by-half-reducing section 91 adds a horizontal line signal of line 430 and a horizontal line signal of line 431 and outputs the added signal as a horizontal line video signal which is scanned to a horizontal line of line 428 by means of dividing the added signal into two.
  • a number of horizontal line signals of 200 lines between line 426 and line 625 is reduced to a number of horizontal line signals of 100 lines between line 426 and line 525 which can be displayed on display section 99.
  • FIG. 2c is a view for illustrating a third method for outputting two horizontal line video signals as one horizontal line video signal.
  • line-by-half-reducing section 91 adds a half of horizontal line signal of line 426 to a half of horizontal line signal of line 427 and outputs a horizontal line video signal which is scanned to a horizontal line of line 426 by means of dividing the added signal into two.
  • line-by-half-reducing section 91 adds a half of horizontal line signal of line 427 to a half of horizontal line signal of line 428 and outputs a horizontal line video signal which is scanned to a horizontal line of line 427 by means of dividing the added signal into two.
  • line-by-half-reducing section 91 adds a half of horizontal line signal of line 428 to a half of horizontal line signal of line 429 and outputs a horizontal line video signal which is scanned to a horizontal line of line 428 by means of dividing the added signal into two.
  • a number of horizontal line signals of 200 lines between line 426 and line 625 is reduced to a number of horizontal line signals of 100 lines between line 426 and line 525 which can be displayed on display section 99.
  • FIG. 3a is a view for showing a screen of a display equipment of an NTSC system on which data of a PAL system is displayed in a conventional apparatus for reproducing data.
  • FIG. 3b is a view for showing a screen of a display equipment of the NTSC system on which data of the PAL system is displayed in a reproducing apparatus according to the present invention.
  • a video signal of 1 to 425 lines is normally displayed but caption data which can be displayed on 100 lines of 200 lines of the screen or in the range of 200 lines on the screen is cut off completely or partially.
  • a correlation between lines is detected with respect to 200 lines after line 425 and compresses 200 lines into 100 lines. Therefore, although horizontal-to- vertical ratio of caption reduces to a half, the caption can be displayed on the screen without a cut-off thereof.
  • FIG. 4 is a block diagram for illustrating a second embodiment of an apparatus for reproducing video data of a video compact disc player according to the present invention.
  • the video data reproducing apparatus comprises a key inputting section 100, an optical pick-up section 200, a driving section 300, a radio frequency amplifying section 400, a first digital signal processing section 500, a clock generating section 600, a second digital signal processing section 700, a control section 800, an analog video signal processing section 900, and a display section 1000 of an NTSC system.
  • Key inputting section 100 comprises plural function key (not shown), generates a key input signal 101 for executing a conventional function of the video compact disc player, and provides the key input signal 101 to control section 800.
  • Optical pick-up section 200 executes an optical pick-up operation of the optical disc (not shown) having caption data loaded on a disc tray (not shown) of the video compact disc player. In addition, optical pick-up section 200 generates a radio frequency signal 21 reflected from the optical disc.
  • Driving section 300 drives optical pick-up section 200 and the optical disc in response to a control signal 801a inputted from control section 800.
  • Radio frequency amplifying section 400 amplifies radio frequency signal 201 provided from optical pick-up section 200 and provides an amplified radio frequency signal 401 to first digital signal processing section 500.
  • Clock generating section 600 generates a color sub carrier signal for processing a video signal and provides the color sub carrier signal to analog video signal processing section 900.
  • clock generating section 600 generates a color sub carrier signal of an NTSC system when video data recorded on the optical disc is video data of the NTSC system, and generates a color sub carrier signal of a PAL system when the video data recorded on the optical disc is video data of the PAL system.
  • the color sub carrier signal of the NTSC system is 3.58MHz and the color sub carrier signal of the PAL system is 4.43MHz.
  • First digital signal processing section 500 executes a digital signal processing operation of the amplified radio frequency signal 401 from radio frequency amplifying section 400 and provides a digital signal processed radio frequency signal 501 to second digital signal processing section 700.
  • Second digital signal processing section 700 comprises a decoder 710 and a digital/analog converter 720.
  • Decoder 710 decompresses a compression of the digital video signal 501 provided from first digital signal processing section 500 and decodes the digital video signal 501 whose compression is decompressed. Decoder 710 provides a decompressed digital video signal 711a to digital/analog converter 720 and provides a color synchronizing signal 711b and a horizontal synchronizing signal 711c to control section 800, respectively. Digital/analog converter 720 converts the digital video signal 711a from decoder 710 into an analog video signal 721a and provides the analog video signal 721a to analog video signal processing section 900.
  • Control section 800 controls driving section 300 and clock generating section 600 in response to key input signal 101 from key inputting section 100 and provides a switching signal 80 le and control signals in response to color synchronizing signal 711b and horizontal synchronizing signal 711c from decoder 710.
  • control section 800 when the optical disc loaded on the disc tray is an optical disc having caption data of the PAL system, control section 800 generates the control signal 801c to clock generating section 600 according to the key input signal 101 from key inputting section 100. At this time, clock generating section 600 provides the color sub carrier signal of 4.43MHz of the PAL to analog video signal processing section 900 as a clock signal 601. In addition, control section 800 sets a video signal processing mode to a PAL mode.
  • Analog video signal processing section 900 comprises a red-green-blue encoding section (hereinafter, referred to as "RGB encoding section") 910, a synchronization separating section 920, a synchronization converting section 930, a peak detecting section 940, a signal selecting section 950, a signal adding section 960, and a switching section 970.
  • RGB encoding section red-green-blue encoding section
  • RGB encoding section 910 responsive to control signal 801b provided from control section 800 and to clock signal 601 provided from clock generating section
  • Synchronization separating section 920 detects a horizontal synchronizing signal and a vertical synchronizing signal from RGB signal 911b provided from RGB encoding section 910, separates both an RGB video signal 921a and a synchronizing signal 921b from RGB signal 911b, and provides a separated RGB video signal 921a and a separated synchronizing signal 921b to peak detecting section 940 and to synchronization converting section 930, respectively.
  • Synchronization converting section 930 counts a horizontal synchronization signal from synchronizing separating section 920 and detects any one of two horizontal synchronizing signals which is counted by synchronizing converting section 930. Afterwards, a horizontal synchronizing signal which is placed after a detected horizontal synchronizing signal is moved to a position of the deleted horizontal synchronizing signal, and the horizontal synchronizing signal is converted.
  • peak detecting section 940 detects a peak signal having a level over a predetermined level from a video signal from synchronizing separating section
  • control section 80 counts a horizontal synchronizing signal in a vertical synchronizing section, i.e. a section of a frame data of a vertical synchronizing signal from synchronization separating section 920.
  • a count value is more than or equals a predetermined number, i.e. , a section in which last data is placed is more than or equals 425
  • control section 80 provides a selection control signal to signal selecting section 950 and provides a switching control signal to switching section 970.
  • signal selecting section 950 While receiving the selection control signal from control section 800, signal selecting section 950 sequentially selects any one of two peak signals with respect to the peak signals supplied from peak detecting section 940 and provides a selected peak signal to signal adding section 960.
  • Signal adding section 960 adds the converted horizontal synchronizing signal
  • a caption signal will be included in the added signal because an illuminance level of the caption signal is higher than an illuminance of a video signal.

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  • Television Signal Processing For Recording (AREA)

Abstract

An apparatus for reproducing video data of a video compact disc player is disclosed. Optical pick-up section reads a radio frequency signal from an optical disc having caption data recorded in a PAL system. Radio frequency amplifying section amplifies the radio frequency signal provided from optical pick-up section. First digital signal processing section processes the radio frequency signal as a digital video signal. Clock generating generates a sub carrier signal corresponding to a record type of data of the optical disc. Second digital signal processing section generates a color synchronizing signal, a horizontal synchronizing signal, and an analog video signal in response to the radio frequency signal. Control section controls the clock generating section and generates a switching signal and a control signal. Analog video signal processing section executes a predetermined operation of an image signal and a caption signal scanned on a lower portion of a screen and outputs an analog video signal whose number of lines of the image signal and the caption signal scanned on the lower portion of the screen is reduced by half. Display section displays an image having the caption data in response to the analog video signal from the analog video signal processing section. Consequently, the video signal recorded in the PAL system is reproduced via display equipment of the NTSC system without a loss of caption data.

Description

APPARATUS FOR REPRODUCING VIDEO DATA OF A VIDEO COMPACT DISC PLAYER
Technical Field
The present invention relates to a method and apparatus for reproducing video data of a video compact disc player (hereinafter, referred to as "VCDP") and more particularly, relates to the method and apparatus wherein caption data is displayed without a loss of outputted caption data while video data having caption data of a phase alternation line system (hereinafter, referred to as "PAL system") is reproduced via a display equipment of a national television system committee system (hereinafter, referred to as "NTSC system") in a video compact disc player. Background Art
As audio/video recording media have made progress, optical disc players which record audio/video signals onto semipermanent optical discs and which reproduce recorded audio/ video signals, have developed. More particularly, the optical disc players such as a compact disc player
(referred to as "CDP"), a laser disc player (referred to as "LDP"), a compact disc graphic player (referred to as "CDGP"), a video compact disc player (referred to as "VCDP") and the like, are becoming increasingly used.
Also, because these optical disc players output video and/or audio signals recorded on the optical discs via speakers rather than via video and/or audio reproducing equipments and because they have a much higher signal-to-noise ratio than conventional video and/or audio reproducing equipments, they are capable of reproducing signals with even better quality (s) of picture and/or of sound, and do not produce a noise caused by unstable reproduction and modulation. Additionally, they have many advantages such as reproducing video and/or audio signals in a state which is almost not subjected to distortion and to ghost, a random access operation and the like, and thereby tend to rapidly make progress and to be widely used.
Meanwhile, as is generally known, video data is recorded together with audio data onto video compact discs (referred to as "VCD's") which are loaded into VCDP's among the optical discs which are loaded into the optical disc players to reproduce recorded signals therefrom, and provides sounds and pictures to users. Additionally, as is generally known, the video data which is recorded onto the VCD's would be recorded in a system of national television system committee (hereinafter, referred to as "NTSC") or of phase alternation by line (hereinafter, referred to as "PAL") or the like. Further, display equipments which are connected to VCDP's to provide sounds and pictures, would be display equipments of the system of the NTSC, PAL and the like.
Generally, video data of the PAL system which is displayed via display equipment of the PAL system has 625 scanning lines and video data of the NTSC system which is displayed via display equipments of the NTSC system has 525 scanning lines.
As a result, if a display equipment of the NTSC system display the video data which is recorded in the PAL system, it give rises to a loss of a region corresponding to 100 lines which is placed at a lower end portion on a screen of the display equipment. In particular, as a conventional caption is placed at a lower portion of a screen, the above lost region corresponding to 100 lines is not even displayed or is displayed with most of the lost region thereof cut off.
Disclosure of Invention
Therefore, it is an object of the present invention to provide an apparatus by which caption data is displayed without a loss of outputted caption data while video data having caption data of a PAL system is reproduced via a display equipment of an NTSC system in a video compact disc player.
In order to achieve the above object, the present invention provides an apparatus for reproducing video data of a video compact disc player, which comprises: key inputting means for generating a key input signal; optical pick-up means for reading a radio frequency signal from an optical disc having caption data recorded in a phase alternation line system and for generating a read radio frequency signal; driving means for driving said optical pick-up means and said optical disc; radio frequency amplifying means for amplifying the radio frequency signal provided from said optical pick-up means; first digital signal processing means for digital signal processing an amplified radio frequency signal from said radio frequency amplifying means; clock generating means for a sub carrier signal corresponding to a record type of data of said optical disc; second digital signal processing means for generating a color synchronizing signal, a horizontal synchronizing signal, and an analog video signal in response to the radio frequency signal from said first digital signal processing means; control means, responsive to the key input signal from said key inputting means, to the color synchronizing signal and to the horizontal synchronizing signal from said second digital signal processing means, for controlling said driving means and said clock generating means and for generating a switching signal and a control signal; analog video signal processing means, responsive to the analog video signal, to the switching signal and to the sub carrier signal, for executing a predetermined operation of an image signal and a caption signal scanned on a lower portion of a screen and for outputting an analog video signal whose number of lines of the image signal and the caption signal scanned on the lower portion of the screen is reduced by half; and display means for displaying an image having the caption data in response to the analog video signal from said analog video signal processing means.
In order to achieve the above object, the present invention provides an apparatus for reproducing video data of a video compact disc player, which comprises: key inputting means for generating a key input signal; optical pick-up means for reading a radio frequency signal from an optical disc having caption data recorded in a phase alternation line system and for generating a read radio frequency signal; driving means for driving said optical pick-up means and said optical disc; radio frequency amplifying means for amplifying the radio frequency signal provided from said optical pick-up means; first digital signal processing means for digital signal processing an amplified radio frequency signal from said radio frequency amplifying means; clock generating means for generating a sub carrier signal corresponding to a record type of data of said optical disc; second digital signal processing means for generating a color synchronizing signal, a horizontal synchronizing signal, and an analog video signal in response to the radio frequency signal from said first digital signal processing means; control means, responsive to the key input signal from said key inputting means, to the color synchronizing signal and to the horizontal synchronizing signal from said second digital signal processing means, for controlling said driving means and said clock generating means and for generating a switching signal and a selection control signal; analog video signal processing means, responsive to the analog video signal, to the switching signal and to the sub carrier signal, for outputting an analog signal whose number of lines is reduced by half by means of sequentially and selectively outputting horizontal synchronizing signal each of an image signal and a caption signal scanned on a lower portion of a screen; and display means for displaying an image having the caption data in response to the analog video signal from said analog video signal processing means.
In the apparatus for reproducing video data of a video compact disc player according to the present invention, in the case where video data having caption data of the PAL system is reproduced via a display equipment of an NTSC system, a signal displayed on an upper portion and a middle portion of a screen is displayed without processing the signal. Also, a signal displayed on a lower portion of the screen is displayed after reducing line numbers of the signal. Consequently, the video signal recorded in the PAL system is reproduced via a display equipment of the NTSC system without a loss of caption data.
Brief Description of the Drawings
The above objects and other advantage of the present invention will become more apparent by describing in detail a preferred embodiment thereof with reference to the attached drawings, in which: FIG. 1 is a block diagram for illustrating a first embodiment of an apparatus for reproducing video data of a video compact disc player according to the present invention;
FIG. 2a is a view for illustrating a first method for outputting two horizontal line video signals as one horizontal line video signal;
FIG. 2b is a view for illustrating a second method for outputting two horizontal line video signals as one horizontal line video signal;
FIG. 2c is a view for illustrating a third method for outputting two horizontal line video signals as one horizontal line video signal;
FIG. 3a is a view for showing a screen on which data of a PAL system generated by prior data reproducing apparatus is being displayed on a display equipment of an NTSC system;
FIG. 3b is a view for showing a screen on which data of a PAL system generated by the present invention is being displayed on a display equipment of an NTSC system; and
FIG. 4 is a block diagram for illustrating a second embodiment of an apparatus for reproducing video data of a video compact disc player according to the present invention.
Best Mode for Carrying Out the Invention
A description will be given below in detail with reference to the accompanying drawings to a configuration and an operation of an apparatus for reproducing video data of a video compact disc player according to an embodiment of the present invention.
FIG. 1 is a block diagram for illustrating a first embodiment of an apparatus for reproducing video data of a video compact disc player according to the present invention. As shown in FIG. 1, the video data reproducing apparatus according to the first embodiment of the present invention comprises a key inputting section 10, an optical pick-up section 20, a driving section 30, a radio frequency amplifying section 40, a first digital signal processing section 50, a clock generating section 60, a second digital signal processing section 70, a control section 80, an analog video signal processing section 90, and a display section 99 of an NTSC system. Key inputting section 10 comprises a plural function key (not shown), generates a key input signal 11 for executing a conventional function of the video compact disc player, and provides the key input signal 11 to control section 80.
Optical pick-up section 20 executes an optical pick-up operation of the optical disc (not shown) having caption data loaded on a disc tray (not shown) of the video compact disc player. In addition, optical pick-up section 20 generates a radio frequency signal 21 reflected from the optical disc.
Driving section 30 drives optical pick-up section 20 and the optical disc in response to a control signal 81a inputted from control section 80.
Radio frequency amplifying section 40 amplifies radio frequency signal 21 provided from optical pick-up section 20 and provides an amplified radio frequency signal 41 to first digital signal processing section 50.
Clock generating section 60 generates a color sub carrier signal for processing a video signal and provides the color sub carrier signal to analog video signal processing section 90. At this time, clock generating section 60 generates a color sub carrier signal of an NTSC system when video data recorded on the optical disc is video data of the NTSC system, and generates a color sub carrier signal of a PAL system when the video data recorded on the optical disc is video data of the PAL system. The color sub carrier signal of the NTSC system is 3.58MHz and the color sub carrier signal of the PAL system is 4.43MHz.
First digital signal processing section 50 executes a digital signal processing operation of the amplified radio frequency signal 41 from radio frequency amplifying section 40 and provides a digital signal processed radio frequency signal 51 to second digital signal processing section 70.
Second digital signal processing section 70 comprises a decoder 71 and a digital/analog converter 72. Decoder 71 decompresses a compression of the digital video signal provided from first digital signal processing section 50 and decodes the digital video signal whose compression is decompressed. Decoder 71 provides a decompressed digital video signal 71a to digital/analog converter 72 and provides a color synchronizing signal 71b and a horizontal synchronizing signal 71c to control section 80, respectively.
Digital/analog converter 72 converts the digital video signal 71a from decoder 71 into an analog video signal 72a and provides the analog video signal 72a to analog video signal processing section 90.
Control section 80 controls driving section 30 and clock generating section 60 in response to key input signal 11 from key inputting section 10 and provides a switching signal and control signals in response to color synchronizing signal 71b and horizontal synchronizing signal 71c from decoder 71.
Namely, when the optical disc loaded on the disc tray is an optical disc having caption data of the PAL system, control section 80 generates the control signal to clock generating section 60 according to the key input signal 11 from key inputting section 10. At this time, clock generating section 60 provides the color sub carrier signal of 4.43MHz of the PAL to analog video signal processing section 90 as a clock signal 61. In addition, control section 80 sets a video signal processing mode to a PAL mode.
Analog video signal processing section 90 comprises a line-by-half-reducing section 91, a multiplexing section 92, and a red-green-blue encoding section 93 (hereinafter, referred to as "RGB encoding section").
Line-by-half-reducing section 91 divides an analog video signal having 426 to 625 line components from digital/analog converter 72 of second digital signal processing section 70 into a horizontal line of unit and detects to output a correlation between an upper line and a lower line with respect to each of the line signals. Then, line-by-half-reducing section 91 reduces two horizontal lines of a video signal by half and provides a horizontal line thereof to multiplexer 92.
Multiplexing section 92 outputs data between line 1 and line 425 as a normal video signal in response to switching signal from control section 80 and selectively outputs the reduced analog signal 91a from line-by-half-reducing section 91 as data between line 426 and line 625 to RGB encoding section 93.
RGB encoding section 93 responds the control signal provided from control section 80 in response to color synchronizing signal 71b, encodes analog video signal
92a provided from multiplexing section 92 in response to clock signal 61 provided from clock generating section 60, and provides an encoded analog video signal 93 a to display section 99.
FIG. 2a is a view for illustrating a first method for outputting two horizontal line video signals as one horizontal line video signal. Referred to FIG. 2a, line-by-half-reducing section 91 adds a half of horizontal line signal of line 426 to a half of horizontal line signal of line 427 and outputs the added horizontal line signal as a horizontal line video signal which is scanned to a horizontal line of line 426 of display section 99 of the NTSC system. Also, line-by-half-reducing section 91 adds a half of horizontal line signal of line 428 to a half of horizontal line signal of line 429 and outputs the added horizontal line signal as a horizontal line video signal which is scanned to a horizontal line of line 427 of display section 99 of the NTSC system.
In addition, line-by-half-reducing section 91 adds a half of horizontal line signal of line 430 to a half of horizontal line signal of line 431 and outputs the added horizontal line signal as a horizontal line video signal which is scanned to a horizontal line of line 428 of display section 99 of the NTSC system.
According to the above described method, a number of horizontal line signals of 200 lines between line 426 and line 625 is reduced to a number of horizontal line signals of 100 lines between line 426 and line 525 which can be displayed on display section 99.
FIG. 2b is a view for illustrating a second method for outputting two horizontal line video signals as one horizontal line video signal.
Referred to FIG. 2b, line-by-half-reducing section 91 adds a horizontal line signal of line 426 and a horizontal line signal of line 427 and outputs the added signal as a horizontal line video signal which is scanned to a horizontal line of line 426 by means of dividing the added signal into two.
Also, line-by-half-reducing section 91 adds a horizontal line signal of line 428 and a horizontal line signal of line 429 and outputs the added signal as a horizontal line video signal which is scanned to a horizontal line of line 427 by means of dividing the added signal into two.
In addition, line-by-half-reducing section 91 adds a horizontal line signal of line 430 and a horizontal line signal of line 431 and outputs the added signal as a horizontal line video signal which is scanned to a horizontal line of line 428 by means of dividing the added signal into two.
According to the above described method, a number of horizontal line signals of 200 lines between line 426 and line 625 is reduced to a number of horizontal line signals of 100 lines between line 426 and line 525 which can be displayed on display section 99.
FIG. 2c is a view for illustrating a third method for outputting two horizontal line video signals as one horizontal line video signal. Referred to FIG. 2c, line-by-half-reducing section 91 adds a half of horizontal line signal of line 426 to a half of horizontal line signal of line 427 and outputs a horizontal line video signal which is scanned to a horizontal line of line 426 by means of dividing the added signal into two.
Also, line-by-half-reducing section 91 adds a half of horizontal line signal of line 427 to a half of horizontal line signal of line 428 and outputs a horizontal line video signal which is scanned to a horizontal line of line 427 by means of dividing the added signal into two.
In addition, line-by-half-reducing section 91 adds a half of horizontal line signal of line 428 to a half of horizontal line signal of line 429 and outputs a horizontal line video signal which is scanned to a horizontal line of line 428 by means of dividing the added signal into two.
According to the above described method, a number of horizontal line signals of 200 lines between line 426 and line 625 is reduced to a number of horizontal line signals of 100 lines between line 426 and line 525 which can be displayed on display section 99.
According to the method wherein two horizontal lines of a video signal are reduced by half and a horizontal line thereof is outputted, horizontal line signals of 1 to 425 lines are scanned without a conversion thereof and horizontal line signals of 426 to 625 lines are converted to be scanned on horizontal line of 426 to 525 lines of a screen of a display equipment of the NTSC system. Consequently, a video signal of the PAL system can be displayed via the display equipment of the NTSC without a loss of the caption signal.
FIG. 3a is a view for showing a screen of a display equipment of an NTSC system on which data of a PAL system is displayed in a conventional apparatus for reproducing data.
FIG. 3b is a view for showing a screen of a display equipment of the NTSC system on which data of the PAL system is displayed in a reproducing apparatus according to the present invention.
As shown in FIG. 3a, in the conventional reproducing apparatus, a video signal of 1 to 425 lines is normally displayed but caption data which can be displayed on 100 lines of 200 lines of the screen or in the range of 200 lines on the screen is cut off completely or partially.
However, according to an embodiment of the present invention, as shown in FIG. 3b, a correlation between lines is detected with respect to 200 lines after line 425 and compresses 200 lines into 100 lines. Therefore, although horizontal-to- vertical ratio of caption reduces to a half, the caption can be displayed on the screen without a cut-off thereof.
FIG. 4 is a block diagram for illustrating a second embodiment of an apparatus for reproducing video data of a video compact disc player according to the present invention.
As shown in FIG. 4, the video data reproducing apparatus according to the second embodiment of the present invention comprises a key inputting section 100, an optical pick-up section 200, a driving section 300, a radio frequency amplifying section 400, a first digital signal processing section 500, a clock generating section 600, a second digital signal processing section 700, a control section 800, an analog video signal processing section 900, and a display section 1000 of an NTSC system. Key inputting section 100 comprises plural function key (not shown), generates a key input signal 101 for executing a conventional function of the video compact disc player, and provides the key input signal 101 to control section 800.
Optical pick-up section 200 executes an optical pick-up operation of the optical disc (not shown) having caption data loaded on a disc tray (not shown) of the video compact disc player. In addition, optical pick-up section 200 generates a radio frequency signal 21 reflected from the optical disc.
Driving section 300 drives optical pick-up section 200 and the optical disc in response to a control signal 801a inputted from control section 800.
Radio frequency amplifying section 400 amplifies radio frequency signal 201 provided from optical pick-up section 200 and provides an amplified radio frequency signal 401 to first digital signal processing section 500.
Clock generating section 600 generates a color sub carrier signal for processing a video signal and provides the color sub carrier signal to analog video signal processing section 900. At this time, clock generating section 600 generates a color sub carrier signal of an NTSC system when video data recorded on the optical disc is video data of the NTSC system, and generates a color sub carrier signal of a PAL system when the video data recorded on the optical disc is video data of the PAL system. The color sub carrier signal of the NTSC system is 3.58MHz and the color sub carrier signal of the PAL system is 4.43MHz.
First digital signal processing section 500 executes a digital signal processing operation of the amplified radio frequency signal 401 from radio frequency amplifying section 400 and provides a digital signal processed radio frequency signal 501 to second digital signal processing section 700.
Second digital signal processing section 700 comprises a decoder 710 and a digital/analog converter 720.
Decoder 710 decompresses a compression of the digital video signal 501 provided from first digital signal processing section 500 and decodes the digital video signal 501 whose compression is decompressed. Decoder 710 provides a decompressed digital video signal 711a to digital/analog converter 720 and provides a color synchronizing signal 711b and a horizontal synchronizing signal 711c to control section 800, respectively. Digital/analog converter 720 converts the digital video signal 711a from decoder 710 into an analog video signal 721a and provides the analog video signal 721a to analog video signal processing section 900.
Control section 800 controls driving section 300 and clock generating section 600 in response to key input signal 101 from key inputting section 100 and provides a switching signal 80 le and control signals in response to color synchronizing signal 711b and horizontal synchronizing signal 711c from decoder 710.
Namely, when the optical disc loaded on the disc tray is an optical disc having caption data of the PAL system, control section 800 generates the control signal 801c to clock generating section 600 according to the key input signal 101 from key inputting section 100. At this time, clock generating section 600 provides the color sub carrier signal of 4.43MHz of the PAL to analog video signal processing section 900 as a clock signal 601. In addition, control section 800 sets a video signal processing mode to a PAL mode.
Analog video signal processing section 900 comprises a red-green-blue encoding section (hereinafter, referred to as "RGB encoding section") 910, a synchronization separating section 920, a synchronization converting section 930, a peak detecting section 940, a signal selecting section 950, a signal adding section 960, and a switching section 970.
RGB encoding section 910, responsive to control signal 801b provided from control section 800 and to clock signal 601 provided from clock generating section
600, encodes analog video signal 721 from digital/analog converter 720 into an RGB signal 91 lb and provides RGB signal 91 lb to synchronization separating section 920.
Synchronization separating section 920 detects a horizontal synchronizing signal and a vertical synchronizing signal from RGB signal 911b provided from RGB encoding section 910, separates both an RGB video signal 921a and a synchronizing signal 921b from RGB signal 911b, and provides a separated RGB video signal 921a and a separated synchronizing signal 921b to peak detecting section 940 and to synchronization converting section 930, respectively.
Synchronization converting section 930 counts a horizontal synchronization signal from synchronizing separating section 920 and detects any one of two horizontal synchronizing signals which is counted by synchronizing converting section 930. Afterwards, a horizontal synchronizing signal which is placed after a detected horizontal synchronizing signal is moved to a position of the deleted horizontal synchronizing signal, and the horizontal synchronizing signal is converted.
Simultaneously, because a normal caption signal has an illuminance signal level which is set higher than that of a video signal and is brighter than a displayed background picture, peak detecting section 940 detects a peak signal having a level over a predetermined level from a video signal from synchronizing separating section
920, and provides a detected peak signal to signal selecting section 950.
Meanwhile, control section 80 counts a horizontal synchronizing signal in a vertical synchronizing section, i.e. a section of a frame data of a vertical synchronizing signal from synchronization separating section 920. When a count value is more than or equals a predetermined number, i.e. , a section in which last data is placed is more than or equals 425, control section 80 provides a selection control signal to signal selecting section 950 and provides a switching control signal to switching section 970.
While receiving the selection control signal from control section 800, signal selecting section 950 sequentially selects any one of two peak signals with respect to the peak signals supplied from peak detecting section 940 and provides a selected peak signal to signal adding section 960.
Signal adding section 960 adds the converted horizontal synchronizing signal
931 provided from synchronization converting section 930 to the selected peak signal
951 provided from signal selecting section 950 and provides an added signal 961 to switching section 970.
As the above described, according to the second embodiment of the present invention, a caption signal will be included in the added signal because an illuminance level of the caption signal is higher than an illuminance of a video signal.
Industrial Applicability In the apparatus for reproducing video data of a video compact disc player according to the present invention, in the case where video data having caption data of the PAL system is reproduced via a display equipment of an NTSC system, a signal displayed on an upper portion and a middle portion of a screen is displayed without a processing the signal. Also, a signal displayed on a lower portion of the screen is displayed after reducing line numbers of the signal. Consequently, the video signal recorded in the PAL system is reproduced via a display equipment of the
NTSC system without a loss of caption data.
While the present invention has been particularly shown and described with reference to particular embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be effected therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

What is claimed is:
1. An apparatus for reproducing video data of a video compact disc player, said apparatus comprising: key inputting means for generating a key input signal; optical pick-up means for reading a radio frequency signal from an optical disc having caption data recorded in a phase alternation line system and for generating a read radio frequency signal; driving means for driving said optical pick-up means and said optical disc; radio frequency amplifying means for amplifying the radio frequency signal provided from said optical pick-up means; first digital signal processing means for digital signal processing an amplified radio frequency signal from said radio frequency amplifying means; clock generating means for generating a sub carrier signal corresponding to a record type of data of said optical disc; second digital signal processing means for generating a color synchronizing signal, a horizontal synchronizing signal, and an analog video signal in response to the radio frequency signal from said first digital signal processing means; control means, responsive to the key input signal from said key inputting means, to the color synchronizing signal and to the horizontal synchronizing signal from said second digital signal processing means, for controlling said driving means and said clock generating means and for generating a switching signal and a control signal; analog video signal processing means, responsive to the analog video signal, to the switching signal and to the sub carrier signal, for executing a predetermined operation of an image signal and a caption signal scanned on a lower portion of a screen and for outputting an analog video signal whose number of lines of the image signal and the caption signal scanned on the lower portion of the screen is reduced by half; and display means for displaying an image having the caption data in response to the analog video signal from said analog video signal processing means.
2. The apparatus for reproducing video data of a video compact disc player as claimed in claim 1, wherein said display means is an image reproducing apparatus of a national television system committee system.
3. The apparatus for reproducing video data of a video compact disc player as claimed in claim 1, wherein said second digital signal processing means comprises: a decoder for decompressing a compression of the digital video signal provided from said first digital signal processing means and for decoding the digital video signal whose compression is decompressed; and a digital/analog converter for converting the digital video signal from said decoder into an analog video signal.
4. The apparatus for reproducing video data of a video compact disc player as claimed in claim 1, wherein said analog video signal processing means comprises: line-by-half -reducing means, response to the control signal provided from said control means, for executing the predetermined operation of the analog video signal from said digital/analog converter, for reducing line numbers of a vertical line video signal of the analog video signal by up to half, and for outputting a reduced analog video signal;
multiplexing means for outputting either the reduced analog video signal from said line-by-half -reducing means or the analog video signal from said second digital signal processing means in response to the switching signal from said control means; and red-green-blue encoding means for encoding the analog video signal provided from said multiplexing means in response to the color synchronizing signal provided from said control means and the sub carrier signal provided from said clock generating means.
5. The apparatus for reproducing video data of a video compact disc player as claimed in claim 4, wherein said control means generates the control signal to said multiplexing means when a counter value of the horizontal synchronizing signal and the color synchronizing signal reaches 425, respectively.
6. The apparatus for reproducing video data of a video compact disc player as claimed in claim 4, wherein said line-by -half-reducing means outputs a line reducing signal by means of adding a half of odd number horizontal line data to a half of even number horizontal line data following the odd number horizontal line data.
7. The apparatus for reproducing video data of a video compact disc player as claimed in claim 4, wherein said line-by-half-reducing means outputs a line reducing signal by means of dividing line data which odd number horizontal line data is added to even number horizontal line data following the odd number horizontal line data into two.
8. The apparatus for reproducing video data of a video compact disc player as claimed in claim 4, wherein said line-by-half-reducing means outputs a line reducing signal by means of dividing line data which a half of odd number horizontal line data and even number horizontal line data following the odd number horizontal line data are added to a half of odd number horizontal line data following the even number horizontal line data into two.
9. An apparatus for reproducing video data of a video compact disc player, said apparatus comprising: key inputting means for generating a key input signal; optical pick-up means for reading a radio frequency signal from an optical disc having caption data recorded in a phase alternation line system and for generating a read radio frequency signal; driving means for driving said optical pick-up means and said optical disc; radio frequency amplifying means for amplifying the radio frequency signal provided from said optical pick-up means; first digital signal processing means for digital signal processing an amplified radio frequency signal from said radio frequency amplifying means; clock generating means for generating a sub carrier signal corresponding to a record type of data of said optical disc; second digital signal processing means for generating a color synchronizing signal, a horizontal synchronizing signal, and an analog video signal in response to the radio frequency signal from said first digital signal processing means; control means, responsive to the key input signal from said key inputting means, to the color synchronizing signal and to the horizontal synchronizing signal from said second digital signal processing means, for controlling said driving means and said clock generating means and for generating a switching signal and a selection control signal; analog video signal processing means, responsive to the analog video signal, to the switching signal and to the sub carrier signal, for outputting an analog signal whose number of lines is reduced by half by means of sequentially and selectively outputting horizontal synchronizing signals to each of an image signal and a caption signal scanned on a lower portion of a screen; and display means for displaying an image having the caption data in response to the analog video signal from said analog video signal processing means.
10. The apparatus for reproducing video data of a video compact disc player as claimed in claim 9, wherein said display means is an image reproducing apparatus of a national television system committee system.
11. The apparatus for reproducing video data of a video compact disc player as claimed in claim 9, wherein said second digital signal processing means comprises: a decoder for decompressing a compression of the digital video signal provided from said first digital signal processing means and for decoding the digital video signal whose compression is decompressed; and a digital/analog converter for converting the digital video signal from said decoder into an analog video signal.
12. The apparatus for reproducing video data of a video compact disc player as claimed in claim 9, wherein said analog video signal processing means comprises: red-green-blue encoding means for encoding the analog video signal into a red- green-blue signal; synchronization separating means for detecting a horizontal synchromzing signal and a vertical synchronizing signal from the red-green-blue signal and for separating both a video signal and a synchronizing signal from the red-green-blue signal; synchronization converting means for counting the horizontal synchronizing signal, for conversion of an erasing of a horizontal synchronizing signal in continued two horizontal synchronizing signals when the counted value of the horizontal synchronizing signal is greater than a predetermined number, and for converting a position of a horizontal synchronizing signal following the erased horizontal synchronizing signal into a position of the erased horizontal synchronizing signal; peak detecting means for detecting a peak signal having a signal level over a predetermined level from the analog video signal; signal selecting means for selectively outputting a peak signal in adjacent two peak signals of the detected peak signals in response to the selection control signal from said control means; signal adding means for adding the converted horizontal synchronizing signal to the selected peak signal and for generating an added signal; and switching means for outputting either the added signal from said signal adding means or the red-green-blue signal from said red-green-blue encoding means in response to the switching signal from said control means.
13. The apparatus for reproducing video data of a video compact disc player as claimed in claim 12, wherein said control means provides the selection control signal and the switching signal to said signal selecting means and to said switching means, respectively, when a counter value of the horizontal synchronizing signal counted in the section of the vertical synchronizing signal reaches 425.
PCT/KR1998/000080 1997-05-29 1998-04-02 Apparatus for reproducing video data of a video compact disc player WO1998054718A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50050899A JP2002501703A (en) 1997-05-29 1998-04-02 Video compact disc player video data playback device

Applications Claiming Priority (4)

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KR1019970021561A KR100240341B1 (en) 1997-05-29 1997-05-29 Video data reproducer of a video compact disc player
KR1997/21572 1997-05-29
KR1997/21561 1997-05-29
KR1019970021572A KR19980085476A (en) 1997-05-29 1997-05-29 Video data player of video compact disc player

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Citations (3)

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JPH08190780A (en) * 1995-01-10 1996-07-23 Kenwood Corp Video cd player
JPH08317343A (en) * 1995-05-16 1996-11-29 Sony Corp Device and method for reproducing video cd
JPH08315490A (en) * 1995-05-17 1996-11-29 Sharp Corp Disk reproducing device

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JPH08190780A (en) * 1995-01-10 1996-07-23 Kenwood Corp Video cd player
JPH08317343A (en) * 1995-05-16 1996-11-29 Sony Corp Device and method for reproducing video cd
JPH08315490A (en) * 1995-05-17 1996-11-29 Sharp Corp Disk reproducing device

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